How do you get to Trogdor in fantasy life?

To get to Trogdor in Fantasy Life, you need to progress through the game's storyline and complete specific quests associated with the "Hero" life. After reaching a certain point, you will be guided to Trogdor's lair, where you can face him as a boss. Be sure to prepare adequately with equipment and skills, as Trogdor presents a challenging encounter. Defeating him will unlock additional content and rewards in the game.